Cenforce 150 mg (which contains Sildenafil Citrate) is generally not suitable for many heart patients because it can significantly affect blood pressure and heart workload. Here are the main reasons: 1. Risk of dangerous drop in blood pressure Sildenafil is a PDE5 inhibitor that relaxes blood vessels and increases blood flow. This can cause a sudden fall in blood pressure (hypotension). In heart patients—especially those already on blood pressure medicines—this drop can become too strong and unsafe, leading to dizziness, fainting, or even shock in severe cases. 2. Dangerous interaction with nitrate medicines Many heart patients use nitrates (like nitroglycerin or isosorbide) for chest pain (angina). When Sildenafil is taken with nitrates, it can cause a life-threatening fall in blood pressure, which is why this combination is strictly prohibited. 3. Increased strain on the heart during ***** activity ***** activity itself increases heart rate and oxygen demand.